Why did Progressive refromers of the early 1900s frequently attack political machines? The machines accepted bribes in return for favors.
The machines denied voting rights to the poor.
The machines wasted money on military spending.
The machines discriminated against migrant workers.

The machines accepted bribes in return for favors.

Explanation:

A political machine was a system of unequal personal relationships in political apparatuses between influential people and their "clients", that is, those people who benefited from their relationship with politicians in exchange for bribes and other illegitimate practices. Thus, these types of organizations functioned unofficially through the assignment of positions through clientelism, behind-the-scenes control and lasting political ties within the framework of representative democracy.  Some machines had a "boss", who was a renowned politician, and all machines have a group of people who depend on the protection of the machine in the form of contracts or jobs.

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